Investigators with the Potter-Randall Special Crimes Unit released the sketch to the public Monday after Amarillo artist Celia Meadors created it last week, said Lt. Gary Trupe, coordinator of the Special Crimes Unit.

Meadors drew the sketch from the recollections of two witnesses, who saw a man inside the store at the time of the stabbing of Huong Rowlett, 63, of Amarillo, Trupe said.

Rowlett died about 7 p.m. from knife wounds suffered in an apparent robbery at the B&B Food Store, 2701 E. 10th Ave. The robbery and attack occurred about 5:45 p.m. to 6 p.m. April 1, according to reports.

Trupe said field officers had the sketch last week, but haven't "been able to come up with anybody to put a face to (the composite sketch) yet."

"What we are asking for is that if anybody knows who this person is, or if anybody who has an idea who this person is ... call the Special Crimes Unit," Trupe said. "If you want to remain anonymous, that is fine with us. I'll take any tip I can."

Trupe said the attacker is described as a Hispanic man, about 6 feet tall, 135 to 150 pounds and about 18 to 23 years old. His hairstyle was described as a fade cut.

At the time of the stabbing, he was a wearing a Polo-style shirt, which had small red-and-white blocks on it.

When the two witnesses walked into the store, they saw a man on top of Rowlett, but they weren't able to see his entire face, which is why the composite sketch is incomplete, Trupe said.

"These guys weren't sure if they were seeing a rape or whether they were seeing an assault," Trupe said. "They didn't think they were seeing a robbery."

The men fled the store and got into a car and began driving around - wondering what they were going to do - when they saw the reported attacker run from the store. They used a cell phone to call police about the attack, but they did not stay to talk to police, Trupe said.

Investigators were able to track them down last week and the pair have been cooperative since police found them, Trupe said.

Trupe said investigators were showing the sketch to Rowlett's family about the same time he was showing the sketch to members of the media Monday.

He also said store owners told a local media outlet that the store did not have any video recordings of the stabbing, Trupe said.

"They had (a video-recording system) in the store. They did not use it," Trupe said.

Trupe would not reveal how many times Rowlett was stabbed, but said she also suffered defensive wounds in her struggle with her attacker.

"She put up a fight," Trupe said.

Anyone with information on who the person is in the sketch should call Amarillo Crime Stoppers at (806) 374-4400 or the Special Crimes Unit at (806) 378-4268.